Apparatus for utilizing the waste gases of portland-cement, lime, and other kilns.



F SCHOTT. APPARATUS FOR UTILIZING THE WASTE GASES 0F PORTLAND CEMENT, LIME, AND OTHER KILNS.

APPLICATION FILED DEC. 30. 19l2.

Patented July 24, 1917.

wi/tvpwoeo 'n s at FRIEDRICH SCHOTT, OF HEIDELBERG, GERMANY.

APPATUS FOR UTILIZING THE meanest.

' following is a specification.

This invention relates to an improved apparatus for utilizing the wastegases of Portland cement, lime and other k1lns for the generation of steam, and incidentally thereto for separating the dust carried along by the same, so as to prevent the ob]e ct10nable depositing of dust in the vicinity of these kilns.

Many attempts were heretofore made for utilizing the heat of the waste-gases of the kilns referred to for generatlng steam 1n steam-boilers located near the outgoing end of the kiln. These attempts, however, were unsuccessful, as the water-tubes of the steam -boi1er, as well as the flues by which the hot Waste-gases are conducted to the boiler, are choked by the dust deposited therein, so that not only the generation of steam in the boiler wasimpaired, but also the draft exerted on the waste-gases diminished and the carrying off of the same to a considerable extent prevented.

The object of this invention is to furnish an apparatus by which the dust is removed from the waste-gases of the kiln, so that they do not choke. up the flues leading to and the spaces around the water-tubes of the steam-boiler, so that the effective generation of steam in a steam-boiler connected with the kiln is rendered possible; and for this purpose the invention consists of an apparatus for utilizing the waste-gases of Portland cement, lime and other calcination kilns for the generation of steam in a steamboiler located adjacent to the kiln and connected with the kiln by a downwardly-inclined flue or conduit, and separating at the same time the dust carried along by the waste-gases by means of baflie-plates extending at both sides around the boiler, so as to collect the dust and prevent its delivery into the atmosphere. The invention consists further of certain details of construction which will be fully described hereinafter and finally pointed out in the claims. Reference is hereby made to mycopending Specification of Letters Patent.

wasrn cases or ronrmmn-cnn'nnr, LIME, aim

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Patented July 24L,'1l@1?.

Application filed December 30, 1912. Serial No. 739,284.

application for Letters Patent of the United States, Serial No. 739,285, filed December the 30th, 1912, in which copending application the structure described herein is disclosed, as well as additional cooling and filterin ucts rom the waste-gases, after the dust and heat have been abstracted therefrom by an apparatus similar to that disclosed in this application.

In the accompanying drawings,

Figure 1 represents a side-elevation of my improved apparatus for utilizing the waste-gases ofPortland cement, lime and other kilns for the generation of steam,

Fig. 2 is a plan-view of the same and Fig. 3 is a detail vertical section through the steam-generator on line 3, 3, Fig. 1.

Similar letters of reference indicate corresponding parts in the figures of the drawmgs.

Referring to the drawings, A represents the rotary drum of a Portland cement, lime or other calcination kiln.- A represents a downwardly-inclined flue through which the waste-gases are conducted from the outgoing end of the kiln to a steam-generator B, preferably a water-tube boiler, which is supported above the outgoing end of the downwardly-inclined flue A In the space below the water-tubes of the steam-generator plate C forms an upward flue 10 connecting the downward flue A with the front section of the generator B. The baflle-plate C separates the midsection of the steam generator from the rear end section thereof and forms a flue 20 between said baffle-plates and a downward flue 30- connecting the rear section of said steam generator through the opening 35 with the chimney 40. The primary baflie-plate C forms with the lower part of the inclined flue A a hopper-shaped receptacle C while between the battle-plates C, C a second hopper-shaped receptacle C is formed. The interstices between the up: per ends of the bafile-plates C, C and the water-tubes are filled up with fire-brick, so that the waste-gases of combustion are compelled to pass from the flue A first in up"- ward direction around the rear-portion of the water-tubes, then in downward direction through the middle portion -.of the same, then along the secondary bafile-plate and over the same, then by means of any well known construction, as the baffle plate D in downward direction through the front-portion of the water-tubes, as shown by the arrows in Fig. 1, and then by means of a suitable chimney or any well known devices are safe into the atmosphere. At the lower end of the hopper-shaped receptacles G, C

' are arranged downwardly-inclined outletpipes D, D through which the hot dust particles, which are separated by the baflleplates in their passage through the waterpelling the waste-gases to take a. circuitous course in passing around the water-tubes of the boiler, the highly heated dust particles can flow oif continuously through the hopper-shaped receptacles and their outlet-pipes. The'waste-gases are thereby enabled to part with the reater amount of their heat, which is utilized for the generation of steam in the water-tubes'of the boiler. By the course of 7 these waste-gases the coarser dust particles are collected first in the lower part of the primary hopper, then after their passage along and over the primary baflle-plate in the lower part of the secondary hopper, and the finer articles in the space between the second ba e-plate and the supporting frontwall of the steam-boiler, before the gases are passed over the water heater shown at the lower right-hand corner of Fig. 1 taken by junction of said downwar the chimney and discharged to the atmo I phere.

I claim: r f e 1. An apparatus .for generating steam by calcination gases comprising a calcining kiln delivery flue, a downward flue leading from said delivery flue, a. steam enerator chamber, a steam generator therem, a bafile-plate forming with said downward flue an inverted apex and an abrupt upward flue connecting said downward flue with one section of said steam generator, a deflector disposed above said baflle-plate, a flue connecting said generator chamber with the exhaust, a dust pocket at the junction of said downward and upward flues, and means for discharging the dust from said pocket.

2. An apparatus for generating steam by calcination gases comprisin a calcining kiln delivery flue, a downward flue leading from said delivery flue, a steam generator chamber, a steam generator therein, a primary baflle-plate forming with said downward flue an inverted apex and an abrupt upward flue connecting said downward flue with one section of said steam generator, a supplemental bafile-plate separating the midsection of said generator from the rear section thereof, a fiuepassage between said bafile-plates, a downward flue between said supplemental baffle-plate and the rear end wall of said chamber, deflectors disposed above said baflle-plates, a dust collectin pocket at the and upward flues, a dust collecting pocket between said bafile-plates, and means for discharging dust from said pockets.

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

R FRIEDRICH SCHOTT. Witnesses:

PAUL Eon, Josnrn l 

